/*
 *  Copyright 2004 Blandware (http://www.blandware.com)
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.blandware.atleap.webapp.action.core.globalProperty;

import com.blandware.atleap.common.util.ConvertUtil;
import com.blandware.atleap.model.core.GlobalProperty;
import com.blandware.atleap.webapp.action.core.BaseAction;
import com.blandware.atleap.webapp.form.core.GlobalPropertyForm;
import com.blandware.atleap.webapp.util.core.GlobalProperties;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import org.springframework.orm.ObjectOptimisticLockingFailureException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

/**
 * <p>Updates global properties
 * </p>
 * <p><a href="UpdateGlobalPropertiesAction.java.html"><i>View Source</i></a></p>
 * <p/>
 *
 * @author Sergey Zubtsovskiy <a href="mailto:sergey.zubtsovskiy@blandware.com">&lt;sergey.zubtsovskiy@blandware.com&gt;</a>
 * @version $Revision: 1.10 $ $Date: 2006/08/03 10:07:55 $
 * @struts.action path="/core/globalProperty/update"
 * name="globalPropertyForm"
 * scope="request"
 * input="inputForward"
 * validate="true"
 * roles="core-globalProperty-update"
 * @struts.action-forward name="inputForward"
 * path=".core.globalProperty.list"
 * @struts.action-forward name="listGlobalProperties"
 * path="/core/globalProperty/list.do"
 * redirect="true"
 * @struts.action-forward name="unsatisfiable"
 * path="/core/globalProperty/list.do"
 */
public final class UpdateGlobalPropertiesAction extends BaseAction {
	/**
	 * @param mapping  The ActionMapping used to select this instance
	 * @param form     The optional ActionForm bean for this request (if any)
	 * @param request  The HTTP request we are proceeding
	 * @param response The HTTP response we are creating
	 * @return an ActionForward instance describing where and how
	 *         control should be forwarded, or null if response
	 *         has already been completed
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
	                             HttpServletRequest request, HttpServletResponse response) throws Exception {

		GlobalPropertyForm globalPropertyForm = (GlobalPropertyForm) form;
		Map properties = globalPropertyForm.getPropertyMap();
		List nonExistentPropertyNames = new ArrayList();
		boolean alreadyUpdatedExist = false;
		for ( Iterator i = properties.entrySet().iterator(); i.hasNext(); ) {
			Map.Entry entry = (Map.Entry) i.next();
			String name = (String) entry.getKey();
			GlobalProperty property = GlobalProperties.getInstance(request.getSession().getServletContext()).retrieveGlobalProperty(name);
			if ( property == null ) {
				nonExistentPropertyNames.add(name);
				continue;
			}
			String value = (String) entry.getValue();
			Long version = Long.valueOf((String) globalPropertyForm.getVersion(name));
			property.setValue(value);
			property.setVersion(version);
			try {
				GlobalProperties.getInstance(request.getSession().getServletContext()).updateProperty(property);
			} catch ( ObjectOptimisticLockingFailureException e ) {
				alreadyUpdatedExist = true;
			}
		}

		if ( !nonExistentPropertyNames.isEmpty() || alreadyUpdatedExist ) {
			ActionMessages errors = new ActionMessages();
			if ( !nonExistentPropertyNames.isEmpty() ) {
				errors.add("nonExistentProperties", new ActionMessage("core.globalProperty.errors.nonExistentProperties", ConvertUtil.convertListToString(nonExistentPropertyNames, ", ")));
			}
			if ( alreadyUpdatedExist ) {
				errors.add("alreadyUpdatedProperties", new ActionMessage("core.globalProperty.errors.updateFailed"));
			}
			saveErrors(request, errors);
		} else {
			ActionMessages messages = new ActionMessages();
			messages.add("updateSuccessful", new ActionMessage("core.globalProperty.messages.updateSuccessful"));
			saveMessages(request, messages);
		}

		return mapping.findForward("listGlobalProperties");
	}
}